<!DOCTYPE html>
<html>
    <head lang="en">
        <meta charset="UTF-8">
        <title></title>
        <style> 
       input[type="checkbox"]:checked{
           outline:2px solid gold;
       }
        </style>
    </head>
   <body>
       <input type="checkbox">阅读
       <input type="checkbox">旅游
       <input type="checkbox">看电影
       <input type="checkbox">跑步
       <input type="checkbox">上网
       <input type="checkbox">逛街

   </body>
</html>